Chapter 2 Developing the Site Plan
This chapter discusses site plan development for installing the Encompass® 4
Reader System.
Overview
Note:
In this section, unless specifically stated, “Encompass 4 Reader” applies both to the
Encompass 4 Reader with integrated antenna and Encompass 4 Reader with external antenna.
Developing a site plan provides the foundation for the site’s system design and establishes the following
system configuration parameters:
•
Number and general location of primary components
•
Number of different radio frequencies required
Gathering relevant site information is crucial before applying for Federal Communications Commission (FCC)
approval and ordering and installing Encompass 4 Reader(s) and tags.
Also, consider the following factors when developing a site plan:
•
Reading of mixed population tags
•
Reader, tag, and antenna alignment
•
Antenna selection
•
Site layout, mounting requirements, and traffic flow
•
Electrical and communication requirements
These factors provide relevant information regarding each site’s physical and electromagnetic environment
and the conditions under which the system must perform.
Reading of Mixed Population Tags
The Encompass 4 Reader reads TransCore’s Super eGo
®
(SeGo) protocol tags, the American Trucking
Association (ATA) and International Organization for Standardization (ISO) read-only tags, whether powered
by battery or beam, and Inter-Agency Group (IAG) tags.
Note:
The Encompass 4 Reader can read ATA or ISO read-only tags in the presence of Intellitag-
based tags, however, it is not recommended to read an Intellitag-based tag in the presence of an
ATA or ISO read-only tag. Doing so may provide unreliable results.
The factors that influence the readability include, but are not limited to physical orientation and configuration,
type of read-only tag, ratio of backscatter cross-section of the tags, and whether the tag is battery or beam-
powered.
Encompass 4 Reader System Guide
TransCore Proprietary.
2–4
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